CN202378498U - Chalk clip - Google Patents

Abstract

The utility model discloses a chalk clip, which is characterized by comprising a sleeve and a jackscrew, wherein the inner side of the sleeve is provided with internal threads; the outer side of the jackscrew is provided with external threads; and the jackscrew is screwed in the sleeve. During use, a chalk is clamped in the sleeve, one end of the chalk is attached to the jackscrew in a contact mode, the jackscrew is adjusted according to the service condition of the chalk, and the aim of adjusting the length in real time can be fulfilled; and moreover, the outside sleeve has a protection function on the chalk.

Description

A kind of chalk folder

Technical field

The utility model relates to a kind of stationery.

Background technology

At school the time, teacher need use chalk to carry out writing on the blackboard now, and chalk fractures through regular meeting, and along with the use of chalk, chalk can shorten gradually, just cannot not become handyly after having lacked, lose and unfortunate, and the waste resource.

The utility model content

The purpose of the utility model is to provide a kind of chalk folder, is used for the clamping chalk, comfortableness and utilization rate when improving the chalk use.

The technical scheme that its technical problem of the utility model solution is taked is: a kind of chalk folder, it is characterized in that comprise sleeve and jackscrew, the inboard of said sleeve is provided with internal thread, and the said jackscrew outside is provided with external screw thread, and said jackscrew screws in sleeve.

The beneficial effect of the utility model is: during use chalk is clamped in the sleeve; Chalk one end and jackscrew are close together contiguously; Jackscrew is regulated according to the operating position of chalk, can reach the real-time regulated purpose of length respectively, and the sleeve in the outside has protective effect to chalk.

Description of drawings

Fig. 1 is the sectional structure sketch map of the utility model;

Among the figure: 1 sleeve, 2 jackscrews, 3 chalks.

The specific embodiment

As shown in Figure 1, a kind of chalk folder comprises sleeve 1 and jackscrew 2, and the inboard of sleeve 1 is provided with internal thread, and the jackscrew outside is provided with external screw thread, and jackscrew 2 screws in sleeve, can regulate the position of jackscrew in sleeve through the rotation jackscrew.

During use chalk 3 is clamped in the sleeve 1, chalk 3 one ends and jackscrew 2 are close together contiguously, and jackscrew is regulated according to the operating position of chalk, can reach the real-time regulated purpose of length respectively, and the sleeve in the outside have protective effect to chalk.

Except that the described technical characterictic of specification, be the known technology of those skilled in the art.

Claims (1)

1. a chalk folder is characterized in that comprise sleeve and jackscrew, the inboard of said sleeve is provided with internal thread, and the said jackscrew outside is provided with external screw thread, and said jackscrew screws in sleeve.

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